Phil Keoghan welcomes the 12 new crew members to Camp Pendleton Marine Corps Base in Southern California, where season one winner Marine Veteran Kelly "Murph" Murphy returns to kick off the new season and guide the crew through their first challenge: race to receive cargo dropped from a C-130 plane.

Crew members punch in for their first individual challenge, repairing snow fences on Mt. Baldy, the highest peak in Los Angeles.

Season two crew member "Freight Train" returns to lead the competitors through their individual challenge of delivering boxes.

Crew members visit the U.S. Coast Guard, where it’s time to sink or swim in a search and rescue individual challenge.

Savage Crew and Dirty Hands race to the Irwindale Speedway in Los Angeles, where they must work together to be the fastest team to complete a race car pit stop.

Savage Crew and Dirty Hands try not to get stuck in the mud during the team challenge, when they must install a crop field irrigation system.

Savage Crew and Dirty Hands take center stage when they must set up a lighting grid at the iconic Los Angeles theater The Wiltern.

Savage Crew and Dirty Hands “pound the pavement” in the team competition where they must reseal a massive parking lot

Savage Crew and Dirty Hands face off in the last team challenge, and the final five individual competitors battle for their chance to compete in the finale.

With the title of champion and the $200,000 prize on the line, the final crew members compete in a series of challenges that test their life skills and physical strength.